Ratchet-drill



' f llivi'rnn STATES PATENT.. Orricn.

PARDON A, VHITNEY, O F CLEVELAND, OHIO.

-RATCHET-DRILL.

SPECIFICATION forming part of Letters Patent No. 292,522, dated January 29, 1884.

i Application filed January 29, 18.83. (No mollel.)-

To all whom, it may concern: A

Beit known that I, PARDON A. IVHITNEY, .of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and vuseful Improvements in Ratchet-Drills; and I do hereby declare that the following is a full, clear, and exact description thereof', whereby a person skilled in the art can make and use the same, reference being had tothe accompanying drawings, and-to the letters of reference marked thereon.

Like letters in the figures indicate the same parts.

'My improvement relates to ratchet-drills which are used for boring holes in metal by hand by the alternate swinging movement ofthe handle, which turns the drilling-tool in one direction and moves back over a ratchet in the other. Such drills are commonly provided with afeeding-screw for advancing the struction of the working parts of the drill-- stock than have heretofore been in use.

In the. accompanying drawings, illustrating` my invention, Figure .1 is a bottom view of my improved ratchet-drill. Fig. 2 is a vertical section through the middle of the tool, with the drilling-bit omitted, any ordinary drilling-tool being applicable t0 my invention. Fig. 3 is a horizontal section through the middle of the ratchet. part of the handle being omitted. Fig. 4 is a view of a short separate screw, which is used when the tool is converted into a boiler-drill.

A is the swinging handle. It is made off. a convenient length in the customary manner, and has an enlarged part at the drill end, in which is formed a suitable socket to hold the ratchet and pawl.

ing must be short; but for ordi-nary purposes" B is the rotating head which holds and turns the drilling-tool. It is furnished with a socket to hold the drill in the customary manner,

and revolves in bearings in the enlarged part D is a ring which ts into a groove in` the f part B, and also has its exterior circumfe`rence of such a diameter as to iit into and close v .the socket in the handle A, provided forfthe wheel C. This ring is split, so that it'can be placed in the groove in B, and then, with the part B, it ,is passed into the socket in the han- A dle, which binds the two parts of the ring to- Y gether. Ilhe pin E is then passed through the sides of the handle and a notch in the rim of D to hold it from being withdrawn..l This holds the parts A and-B securely together.

F is a pawl having a cylindrical rear end which fits into a cylindrical socket in the handle to form its hinge. Its forward end swings freely in an enlarged part of the socket in the handle A and engages with the ratchet C.

This pawl is inserted in the handle before the the middle of B to the top of the socket provided for the upper end of the drill.

J3 is a screw turning ina threaded socket in 'thesleeve K, and passing into this sleeve as far as the center point, L.

*J* is a square between the two screws for the purpose of applying a wrench to turn them. The sleeve K, with the point L, forms the upper support of the tool, which acts against the blocking in the customary manner to advance the point of the drill when the screw J or the sleeve K is turned.

IOC

M is a separate screw composed of thethree parts MZ, M3, and M.

M2 is a screw correspondingto J and fitting, like it, into the hollow thread in the head l.

M3 is a center point corresponding to L, and serving as a point of support against the blocking.

M4 is a square for turning` the screw by means of a wrench.

By means of the special arrangement ot the socket-bearing sleeve and the double screwspindle shown in Fig. having the lower screw, J2, working in the socket in the part B, I am enabled to remove the sleeve andthe spindle and substitute the screw M, when it is desired to use the drill in a coniined space, where the longer part would be inconvenient or impossible to use, as when the tool is used as a boiler-drill, and at the same time provide a drill which shall have a great range of feed when required for ordinary work.

By making the double screw-spindle in the form shown, in addition to the ordinary range of feed-screw, which. is represented by the screw J3, as such drills are commonly eenstrueted, I get the additional length of the screw J 2, Workingin the socket in B.

By my improved construction I utilize the entire length of the tool i'rom the end ot' the drilling-bit to the inside of the center point, L, for the feed-screw.

In using my improved ratchet-drill, the l ool is set up,with the screws J f and J* of the donble screw-spindle both turned into their re spective sockets in the part B and the sleeve K as far as possible. The feed is then obtained by turning the sleeve K by a pin inserted in holes K, or in any other convenient manner, until the screw J 3 is nearly o'ut. The spindle is then turned by a wrench applied to the square part J t, which turns the spindle and parts above it together and advances the drill by means of the thread of the screw J 2 withdrawing -rfrom the socket.

By means of `my improvements I am enabled to combine a common ratchet-drill and a boiler-drill with only the separate screw M, and to provide a drill having a greater length of i'eed i'or the same length of drill than has heretofore been in use.

\Vhat I claim as my invention isl. rlhe combination of the double screwspindle J, having the intermediate head, J, with the threaded sleeve l( and the head B, provided with a threaded socket for thelower end of the screw-spindle, all substantially as described.

2. Jointly with the head B, having the threaded socket, the interchangeable parts, screw M and double screw-spindle J, all substantially as described, and i'or the purpose set i'orth. a

3. The combination of' the revolving head B, provided with the wheel C, the handle A', socketed for the reception of said head and wheel, the ring D, and the pin E, substantially as described.

4. The combination of the handle A, provided with sockets for the ratchet C, and pawl l?, the head B, provided with the ratchet C, the pawl F, provided with a cylindrical bearing, and the ring and pin D E, by which the parts are secured in place, substantially as described.

IARDON A. XVHlTNlJY.

\Vit11esses:

L. H. Tnnlnwav, CHA-ls. l'. JnviiINs. 

